(广东工业大学 材料与能源学院，广州 510006)
摘 要: 采用铜模吸铸工艺制备出直径为3 mm的Cu50.4Ti27.1Zr16.2Co6.3和Cu50.9Ti27.4Zr16.4Co5.3非晶圆棒，用X射线衍射、差示扫描量热仪、扫描电子显微镜、能谱分析仪和振动样品磁强计研究非晶合金的热稳定性、结构组织、相成分和磁性能。结果表明：当升温速率为20 ℃/min时，该两种非晶合金的过冷液相区分别为59 K和41 K；在磁性元素含量较小的铜合金体系中，小范围变化Co含量对饱和磁化强度的影响不大；样品直径由3 mm增大到5 mm时，非晶基体中会析出较多形状不规则富Co和Ti的混合相，使样品的饱和磁化强度Ms明显增大。
关键字: CuTiZrCo块体非晶合金；玻璃形成能力；深共晶点；磁性能
（Faculty of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China）
Abstract:Cu50.4Ti27.1Zr16.2Co6.3 and Cu50.9Ti27.4Zr16.4Co5.3 amorphous rods with diameter of 3 mm were prepared by copper mold suction casting process. Their thermal stability, microstructures, phase compositions and magnetic properties were detected by X-ray diffractometer (XRD), differential scanning calorimeter (DSC), scanning electron microscope(SEM), energy dispersive spectrum (EDS) and vibrating sample magnetometer(VSM). The results show that, at a heating rate of 20 ℃/min, the supercooled liquid regions of the two bulk metallic glasses are 59 K and 41 K, respectively. The small-scale change of Co content in the Cu-based alloy system has little effect on the saturation magnetization (Ms). When the diameters of the samples increase from 3 mm to 5 mm, the magnetic phase with rich Co and Ti precipitates in the amorphous matrix. Then, the saturation magnetization (Ms) of the samples significantly increases.
Key words: CuTiZrCo bulk metallic glass; glass forming ability; deep eutectic point; magnetic properties
